Stove construction



R. HOFFMAN.

STVE CONSTRUCTION. APPLICATION FILED SEPT. I3, 1920- AI @9956 Patented May 23, 11922 2 SHEETS-SHEET 2.

x5? www Mu RUDOLPH-HOFFIIMN, 0F KANKAKEE, ILLINOJES, ASSIGNOR T0 U0., UF CJHICAGO, ILLINOIS,

spans, 'nenn-nca aan .A COBPORATXON 01.1" NEW YUM.

STUWIIE CNSTRUCTION.

Specification of Letters Patent.

Patented May 23, 11922..

Application nled september 13, 1920. Serial Ito. 409,771.

To all 'whom t may concern."

lie it known that I, RUDOLPH HOFFMAN, a citizen of the United States, residing at Kankakee, in the county of Kankakee and lState of Illinois, have invented certain new of a rugged character, may be constructed at a low cost, and presents a neat and ornamental appearance.

A further object of the invention is to provide a door construction of an improved type in which an air insulating space is provided within the door.

The objects of the invention thus generally stated, together with other and ancillary advantages, are attained by the construction and arrangement illustrated in the accompanying drawings forming part hereof in which Figure 1 is a perspective view of a stove having superimposed ovens embodying my invention. Fig. 2 is a rear elevation of a door, detached. Fig. 3 isa fragmentary sectional view through one of the doors and its jamb, the view being taken on an enlarged scale substantially in the plane of line 3--3 of Fig. 1. Fig. 4 is a similar view taken in the plane of line 4-4 of Fig. 1. Fig. 5 is a sectional view taken on line 5-5 of Fig. 2. Fig. 6 is a fragmentary perspective view showing a detail of construction. Fig. 7 is a rear view of the door detached, the back pla-te and panel of the door being removed. Fig. S'is a fragmentary perspective view of a corner of the door frame. Fig. 9 is a similar view but showing uncovered the joint between adjacent side portions of the frame. Fig. l() is a frag-- mentary sectional view taken in the Vpla-ne of line 10-10 of Fig. 11, Fig. 11 is a horizon I tal sectional view through one corner of the door looking toward the inner side thereof.

Referring to Fig. 1, the stove to which my invention is herein applied comprises an oven section providing an upper or baking oven 10 and a lower or broiler oven 11 provided respectively with doors 12 and 13. Inasrnuch as both of the doors are of identical construction, only one need be described.

.The lmproved door comprises generally a frame 14 rectangular in form, a panel 15 adapted to be inserted within the frame and suitably secured in position therein, and a back plate 16.

The frame 14C may be formed from two 'strips of metal having at its inner edge an inturned portion 17 and at its outer edge an int'urned portion or flange 18. One of the strips 1s adapted to provide the upper and side portions of the frame, respectively designated 14 and 14h, and the other strip provides the bottom portion 14c of the frame. I n forming the top and the two side portions, the strlp is suitably notched, in a well known manner, so that it may be bent at the notches into rectangular form, the opposlte edges of the notches being brought together to form a mitered joint. In thus notchmg the strip, the metal is severed through the inner inturned flange or wall 17 of the channel and through the base or bottom thereof to (but not through) the opposite or outer wall 18 (Figs. Preferably said notches are made slightlv greater than a right angle so that when the portions of the strip are positioned at rightangles with reference to each other, va slot 19 is formed between the ends of adjacent side portions of the frame, as shown in Fig. 9. Within this slot is mounted a corner vmember or plate 2() bent from a strip of relatively thin metal to narrow outer strip 21 having' side portions folded inwardly and then downwardly through the slot 19, whence they are bent outwardly into engagement with the under side of the frame, the completed member being dove-tailed in form. As shown in Figs. 7 and 11, the inturned portions 22 are notched at one end as shown at 23 to permit of the easy bending of the metal to conform with the rounded shape of the interior of the frame at the outer corners thereof. These corner plates not only provide a finished appearance for the door, but serve to strengthen the joint formed between the side portions. For the sake of uniformity, the lower ends of the side portion 14" and the opposite ends of the lower portion 1lic of the frame are shaped to provide a mitered provide a relatively 9 and 11).l

y more particularly set joint similar to that at the upper corners of the frame between the top and side portions 14a and 14".

For the purpose of strengthening the frame, the outer wall or flanges 18 of the several portions14, 14h and 14c are folded inwardly around rigid reinforcing bars 24. In the case of the bottom portion 140, the flange is bent only artially around the bar, as at 188L (Fig. 3), or a purpose which will later appear, said flange being doubled back over the ins1de of the sideqand top bars, as at 18". The bottom bar 24 may be secured to its flange 18 as by means of rivets 24a. Preferably the reinforcing bars for the side portions 14b and the bottom portion 14c are adapted to interengage so as to strengthen the joints between these portions of the frame. Thus the side bars are apertured as at 25 (Fig. 6) at their lower ends to receive the opposite ends of the lower bar, the latter bein@f reduced in size as at 26 for this purpose. l`he. reduced portions 26 of the lower bar are then extended'and shaped for use in mounting the door upon the stove as forth in my copending application, Serial No. 415,17 7, filed Oct. 6. 1920.

The panel 15 comprises a central portion 2T projecting forwardly from the frame a.

substantial distance and having side portions or flanges 28 engaging with the inner edge portions 1T of the frame, which latter are of relatively small width or depth so that the panel forms with the main or base portion of the channel frameI the front wall of the door. The panel may be secured in this position by means of bolts 29 enteredV through the corner members 2() (Fig. 5) from the exterior' thereof and thence through the corners of the panel side portions 28, the parts being secured together by means of nuts 30 on the bolts 29. It will be seen that with the panel thus secured in position in the frame` a strong and rigid construction is provided.

Upon the upper portion 14a of the frame, at.`the forward side thereof, is mounted a handle 31. For this purpose a pair of studs 32 are provided upon the inner side of the frame intowhich screws 33 are entered, th@ latter passing through the handle and the frame (Fig. 3). To permit the passage of said studs through the side portions 28 of the panel, the latter is provided with suitable apertures 34.

The back plate 16 of the door is adapted at itslower edge to be-entered between the lower reinforcing bar 24 and the inturned portion-,18L of the flange 18 as shown in Fig. 3. At its side and top edges, however, the plate is provided with inturned portions or flanges 35 (Figs. 3 and 4) the inner edges of which are adapted to engage with the side portion 28 of the panel. To

secure the back plate 16 in position, screws 3G are entered into the studs 32, at the ends opposite the handle screws 33, said studs be- `ing made of suflicient length for thisl` pur* plate is thus located subpose. The back stantially flush with the inner edges of the outer walls of the channel frame, and said walls with their bars 24 are made of substantial width so as to provide thickness to the door, with the front and rear walls spaced a substantial distance apart.

In order that the door shall form with the front of the stove a relatively tight seal, the jamb 37 of the stove is offset inwardly at 38 (Figs. 3 and 44) so as to form a rabbet groove into which the, door is adaptedto enter.

It will be seen that I have provided al construction for oven doors of gas stoves and the like which is of a very practical charac.- ter. -Not only is the door efficient from a` structural standpoint, but presents a neat and ornamental appearance and serves to efficiently close the opening into the oven.

It will be understood that while the invention is herein illustrated with considerable particularity, it is contemplated that various changes in details of construction and arrangement may be made without departing from the spirit and scope of the invention as expressed in the appended claims.

l claim as my invention:

1. Ira a stove construction, a door comprising a frame having inner and outer inturned edge portions, the outer portions having associated therewith a rigid reinforcing bar, a panel engagingl at its side edges with the inner edge portions of the frame, and a back plate mounted in spaced relation with reference to said panel.

2. ln a stove construction, thel combination with a door comprising a rectangular frame having inner and outer inturned edge portions, the outer edge portion having associated therewith a rigid reinforcing bar and being of substantially greater depthl ject through the opening in the frame and-v side portions adapted to engage with the inner wall of the channel frame, and a back plate for the door having inturned portions adapted to space the saine with respect to the panel with its surface substantially flush with the outer edges of the outer edge portions of the frame, and means for securing the panel and back plate in position in spaced relation relative to each other.

3. In a stove construction, the combination of a door comprising a frame of rectangularl formation having an outer inturned flange, a panel and a back plate secured to the frame in spaced relation with reference to eachl other, the outer Surface of the back plate being substantially flush with the llO IBO

talante v outer edges of said outer flange of the frame.

a. In a stove construction, the combination of a door comprising a frame having inner and outer inturned edge portions, the outer edge portion of the frame having secured upon its inner side a rigid reinforcing bar, a panel secured upon the frame, and a jamb for the door having a rabbcted-groove into which the outer edge of the outer ledge portion with its reinforcing bar is adapted to enter.

5. ln a stove construction, a door comprisin a frame having inner and outer inturne edge portions, the outer edge portion being of substantially greater depth than the inner edge portion, a panel engaging with the inner channel wall, and a back plate having flanges for spacing it from the panel and secured to the frame with its outer surface flush with the inneredges of the outer edge portions of the frame.

`6. .ln a stove construction, the combination of an oven door comprising a frame formed f om sheet metal, the adjacent side portions olfy the frame being spaced slightly from each other and having entered therein a dovetailed corner plate providing an outer strip closing said space and inturned portions bent into engagement with the inner sides of the fram 7. ln a stove construction, a door comprising a frame having an outer inturned flange, a panel engaging with the inner edge of the frame, and a back plate mounted in spaced relation with reference to said panel and with its outer or rear surface flush with the inner edges of the outer flange. l j

8. lln a stove construction, a door comprising a frame having outer inturned lianges, a panel engaging with the inner edge of the frame, and a back plate mounted in spaced relation with reference to said panel and with its outer or rear surface flush with the inner edges ofA said flanges, said panel having a portion projecting through the opening of the frame.

9. lln an oven door, the combinationeof a frame constructed from sheet metal with adjacent side portions of the frame spaced a short distance apart, and dove-tailed corner lates entered within the spaces between adjacent side portions to provide a reinforcing member for the frame as well as to close the space whereby to impart a neat appearance to the frame.

10. In an oven door, the combination of a rectangular Elframe formed from two strips of sheet me al, one of said strips providing two or more adjacent side portions initially notched to permit of the bending ofthe frame at right angles, said notch being shaped to provide a space between adjoining portions of the frame when bent, and a corner plate providing an outer portion adapted to close said slot and inturned portions adapted to engage with the] inner side of the frame.

11. ln an oven door, the combination of a rectangular frame formed from two strips of sheet metal, one of said strips having an inner inturned edge portion providin two or more adjacent slde portions initially notched through the inner edge portion and the main wall to 'permit of the bending of the frame at right angles, said notch being shaped to provide a space between adjoining 1 portions of the frame when bent, and a dove-tailed corner plate adapted to close said space. l

12. lln an oven door, the combination of a rectangular frame formed from two strips of sheet metal, one of said strips providing two or more adjacent side portions initially notched to permit of the bending of the frame at right angles, said notch being shaped to rovide a space between adjoining portions of the frame when bent, and a corner plate providing an outer portion adapted to close said slot and inturned portions adapted to engage with the inner side of the frame, a panel for the door having side portions engaging with the inner channel wall of the frame, and means entered through said corner plates and said side portions of the panel whereby to secure the panel in position upon the frame.

13. An oven door comprising a frame formed of sheet metal and having inturned outer edge portions, a panel engaging with the frame at the inner edges thereof, said outer edge portion having at one side of the frame a flange bent substantially parallel to the panel but spaced therefrom, a back plate adapted to engage beneath said flange, means for spacing the back plate from the panel, and means for securing the back plate to the frame at the edge thereof opposite said flange.

14. ln a stove construction, the combination of a door comprising a rectangular frame formed from two strips of metal, one of said strips providing opposite side and top portions of the frame and the other one of said strips providing the bottom portion of the frame, a rigid reinforcing bar operatively associated with the outer edges of the frame, the frame having an inturned flange on one of said outer edge portions, and a back plate for the door adapted to be entered between said flange and the adjacent reinforcing bar, and means for securing the upper edge of the back plate to the frame.

15. An oven door comprising a frame formed of sheet metal and having outer edge portions of substantial width, a panel seated upon the inner edges of the frame, a back plate adapted to interengage at one edge with the frame and having means at its opposite edge for securing it to the frame,

and means for holdine the anel in osiltion' in the frame While spacing it from the back plate.

16. An oven door comprising a frame formed of sheet metal and having outer edge portions of substantial width, a panel seated upon the inner' edges of the trame, a back plate adapted to interengage at one edge with the frame and having means at its opposite edge for securing it to the trarneq means loetween the panel and the back and carried by one of said parts for maintain.- ing them in spaced relation.

17. A door having a frame formed ol"` sheet metal with an outer inturned edge portion of Substantial Width, a rigid reinforcing bar secured Within said edge p0rtion at one side of the ii'am'e, a panel enaging With the inner edge of the frame, a

ack plate interengaging at one side edge With the frame and said reinforcing bar,

j means interposed between the panel and the back plate to maintain them in spaced relation, and means for clamping the back plate and thereby the panel to the frame.

18. An oven door comprising a sheet rnetal frame having an outer inturned edge portion of substantial Width, a panel having a portion entered through the aperture formed by the frame and having side por tions engaging with the inner edges ol the frame, a baek plate interengaging at its lower edge with the frame, means interposed between the frame and the panel for maintaining them in spaced relation, a handle, and means for Securing the handle upon the tace of the frame near the upper edge thereof and securing the upper edge of the back plate to the traine.

19. An oven 'door comprising a frame formed of sheet metal and having outer infin-ned edge portions ot substantial width. a panel having a portion entered through the aperture defined bv the trarne and side portions engaging with the inner edges oi the trarne, a back plate, means interposed between the side portions otl the panel and the hack plate Jfor spacing them vapart with the outer face of the back plate substantially flush with the free edges of said outer edge portions, and means Jor securing the back plate and panel in position in the 'f1-ame.

In testimony whereof, l have hereunto set niv hand.

i RUDOLPH HFFBAN. 

